Dig it! A new object, codenamed J002E3, has been found to have a lazy, 50-day orbit around Earth. What is it? Could be a discarded piece of space junk; could be a big-ass asteroid trapped by our gravitational field. No-one knows.

But even weirder:

If it is determined that J002E3 is natural it will become Earth’s third natural satellite.

Earth’s second one is called Cruithne. It was discovered in 1986 and it takes a convoluted horseshoe path around our planet as it is tossed about by the Earth’s and the Moon’s gravity.